Add log for block_devmode

Helps to track down issue with block_devmode for Chromad devices.

BUG=chromium:889893
TEST=None

Change-Id: Iad22f7b86ba5c2a69c31f23ec0fd221288eed767
Reviewed-on: https://chromium-review.googlesource.com/c/1477267Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636772}

chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc

@@ -124,6 +124,9 @@ bool GetBlockdevmodeFromPolicy(
     }
   }
 
+  VLOG(1) << (block_devmode ? "Blocking" : "Allowing")
+          << " dev mode by device policy";
+
   return block_devmode;
 }
 
@@ -236,10 +239,11 @@ void EnrollmentHandlerChromeOS::HandleAvailableLicensesResult(
     return;
   } else if (status != DM_STATUS_SUCCESS) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE, base::BindOnce(&EnrollmentHandlerChromeOS::ReportResult,
-                              weak_ptr_factory_.GetWeakPtr(),
-                              EnrollmentStatus::ForStatus(
-                                  EnrollmentStatus::LICENSE_REQUEST_FAILED)));
+        FROM_HERE,
+        base::BindOnce(&EnrollmentHandlerChromeOS::ReportResult,
+                       weak_ptr_factory_.GetWeakPtr(),
+                       EnrollmentStatus::ForStatus(
+                           EnrollmentStatus::LICENSE_REQUEST_FAILED)));
     return;
   }
   if (available_licenses_callback_)